Steps that are necessary to run DBCA via Xming (Flashgrid-enabled clusters)

January 24, 2019 Leave a comment

1. Remove immutable flag from /etc/ssh/sshd_config file:

# chattr -i /etc/ssh/sshd_config

2. Change the following in /etc/ssh/sshd_config:

From:

#X11UseLocalhost yes

To:

X11UseLocalhost no

4. Readd immutable flag to /etc/ssh/sshd_config file:

# chattr +i /etc/ssh/sshd_config

4. Restart sshd service:

# systemctl restart sshd

5. Start Xming on your computer and reconnect to the server via putty with X11 enabled.

6. Check current DISPLAY settings:

$ echo $DISPLAY
192.168.1.2:10.0

7. Copy Xauthority file from fg to oracle

$ sudo cp /home/fg/.Xauthority /home/oracle/.Xauthority
$ sudo chown oracle:oinstall /home/oracle/.Xauthority

8. Switch to oracle user and export DISPLAY variable, assign the same value that was returned from fg user (from where you run sudo su – oracle):

$ sudo su – oracle
$ export DISPLAY=192.168.1.2:10.0

9. Run DBCA:

$ dbca

Filed under DB Tagged with , ,

GGSCI: error while loading shared libraries: libclntshcore.so.18.1: cannot open shared object file: No such file or directory

January 18, 2019 Leave a comment

Problem:

Oracle GoldenGate Software Command Interface (GGSCI) 18c raises error:

$ /GG_HOME/home_1/ggsci
/GG_HOME/home_1/ggsci: error while loading shared libraries: libclntshcore.so.18.1: cannot open shared object file: No such file or directory

Cause: 

GoldenGate put all necessary shared objects (.so files) under its own home directory, but several shared objects may not be found there. They should be borrowed from RDBMS or GI home.

Solution:

# find / -name libclntshcore.so.18.1
…
/u01/app/18.3.0/grid/.patch_storage/28090523_Jul_14_2018_00_03_50/files/lib/libclntshcore.so.18.1
/u01/app/18.3.0/grid/.patch_storage/28655784_Oct_8_2018_21_27_28/files/lib/libclntshcore.so.18.1
/u01/app/18.3.0/grid/lib/libclntshcore.so.18.1
/u01/app/18.3.0/grid/inventory/Scripts/ext/lib/libclntshcore.so.18.1

Create symbolic link:

$ cd /GG_HOME/home_1
$ ln -s /u01/app/18.3.0/grid/lib/libclntshcore.so.18.1 libclntshcore.so.18.1

Rerun ggsci.

 

Filed under 18c, Golden Gate Tagged with , , ,

What is a Flex ASM and how to check if it is enabled?

January 16, 2019 Leave a comment

In versions prior to 12c, the ASM instance needed to be run on each of the nodes of the cluster. In case ASM was not able to start, the database instance located on the same node was not able to come up also. There were a hard dependency between database and ASM instances.

With Oracle Flex ASM, databases are able to connect remote ASM using network connection(ASM network). In case of ASM instance fails, the database instance will reconnect to another ASM instance on another node. This feature is called Oracle Flex ASM.

Check if you are using such a great feature using the following command:

[grid@rac1 ~]$ asmcmd
ASMCMD> showclustermode
ASM cluster : Flex mode enabled

 

Filed under 12c, 18c, ASM, RAC Tagged with , , , , ,

GGSCI: error while loading shared libraries: libclntsh.so.18.1: cannot open shared object file: No such file or directory

January 11, 2019 Leave a comment

Problem:

Oracle GoldenGate Software Command Interface (GGSCI) 18c raises error:

$ /GG_HOME/home_1/ggsci
/GG_HOME/home_1/ggsci: error while loading shared libraries: libclntsh.so.18.1: cannot open shared object file: No such file or directory

Cause: 

GoldenGate put all necessary shared objects (.so files) under its own home directory, but several shared objects may not be found there. They should be borrowed from RDBMS or GI home.

Solution:

# find / -name libclntsh.so.18.1
…
/u01/app/18.3.0/grid/.patch_storage/28090523_Jul_14_2018_00_03_50/files/lib/libclntsh.so.18.1
/u01/app/18.3.0/grid/.patch_storage/28655784_Oct_8_2018_21_27_28/files/lib/libclntsh.so.18.1
/u01/app/18.3.0/grid/lib/libclntsh.so.18.1
/u01/app/18.3.0/grid/inventory/Scripts/ext/lib/libclntsh.so.18.1

Create symbolic link:

$ cd /GG_HOME/home_1
$ ln -s /u01/app/18.3.0/grid/lib/libclntsh.so.18.1 libclntsh.so.18.1

Rerun ggsci.

 

Filed under 18c, Golden Gate Tagged with , , ,

OGG-02022 Oracle GoldenGate Capture for Oracle, ext1.prm: Logmining server does not exist on this Oracle database

January 8, 2019 Leave a comment

Problem:

The extract EXT1 stops immediatelly in Golden Gate environment:

GGSCI (stbyrac1.example.com as ggcw@orcl1) 4> start ext1

Sending START request to MANAGER …
EXTRACT EXT1 starting

GGSCI (stbyrac1.example.com as ggcw@orcl1) 5> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING
EXTRACT STOPPED EXT1 00:00:00 00:52:17
REPLICAT RUNNING REP1 00:00:00 00:00:02

Troubleshoot:

/GG_HOME/home_1/ggserr.log file contains the following error:

2019-01-08T23:05:11.364+0000 ERROR OGG-02022 Oracle GoldenGate Capture for Oracle, ext1.prm: Logmining server does not exist on this Oracle database.
2019-01-08T23:05:11.364+0000 ERROR OGG-01668 Oracle GoldenGate Capture for Oracle, ext1.prm: PROCESS ABENDING.

Solution:

Register the extract:

GGSCI (stbyrac1.example.com as ggcw@orcl1) 8> register extract ext1 database

2019-01-08 23:10:54 INFO OGG-02003 Extract EXT1 successfully registered with database at SCN 2126943.

Verify:

GGSCI (stbyrac1.example.com as ggcw@orcl1) 9> start ext1

Sending START request to MANAGER …
EXTRACT EXT1 starting

GGSCI (stbyrac1.example.com as ggcw@orcl1) 10> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING
EXTRACT RUNNING EXT1 00:00:00 00:58:38
REPLICAT RUNNING REP1 00:00:00 00:00:04

Filed under Golden Gate Tagged with , ,

GGSCI: error while loading shared libraries: libnnz18.so: cannot open shared object file: No such file or directory

January 7, 2019 Leave a comment

Problem:

Oracle GoldenGate Software Command Interface (GGSCI) 18c raises error:

$ /GG_HOME/home_1/ggsci
/GG_HOME/home_1/ggsci: error while loading shared libraries: libnnz18.so: cannot open shared object file: No such file or directory

Cause: 

GoldenGate put all necessary shared objects (.so files) under its own home directory, but several shared objects may not be found there. They should be borrowed from RDBMS or GI home.

Solution:

# find / -name libnnz18.so
/u01/app/18.3.0/grid/lib/libnnz18.so
/u01/app/18.3.0/grid/inventory/Scripts/ext/lib/libnnz18.so

Create symbolic link of the specidifed library in the Golden Gate home:

$ cd /GG_HOME/home_1
$ ln -s /u01/app/18.3.0/grid/lib/libnnz18.so libnnz18.so

Rerun ggsci.

 

Filed under Golden Gate Tagged with , , ,

ERROR: This EXTRACT EXT1 is already registered with the database.

January 3, 2019 Leave a comment

Problem:

Trying to register ext1 extract and getting the error:

GGSCI> register extract ext1 database

2019-01-03 20:48:26 ERROR OGG-08241 ERROR: This EXTRACT EXT1 is already registered with the database.

Troubleshooting:

GGSCI> info all

Program Status Group Lag at Chkpt Time Since Chkpt

MANAGER RUNNING

Solution:

Unregister extract first:

GGSCI> unregister extract ext1 database

2019-01-03 20:51:24 INFO OGG-01750 Successfully unregistered EXTRACT EXT1 from database.

Reregister again:

GGSCI> register extract ext1 database

2019-01-03 20:52:15 INFO OGG-02003 Extract EXT1 successfully registered with database at SCN 1643626.

Filed under Golden Gate Tagged with , ,